[nrf toup][nrfconnect] rename OPENTHREAD_SECURITY Kconfig choice

To OPENTHREAD_SECURITY_CONFIG just as was done in Zephyr.

Signed-off-by: Tomi Fontanilles <tomi.fontanilles@nordicsemi.no>

Author: tomi-font

config/nrfconnect/chip-module/Kconfig.defaults

@@ -363,10 +363,10 @@ endif # CHIP_WIFI
 # Crypto configuration
 # ==============================================================================
 
-choice OPENTHREAD_SECURITY
+choice OPENTHREAD_SECURITY_CONFIG
     default OPENTHREAD_NRF_SECURITY_PSA_CHOICE if CHIP_CRYPTO_PSA
     default OPENTHREAD_NRF_SECURITY_CHOICE
-    
+
 endchoice
 
 choice RNG_GENERATOR_CHOICE
@@ -557,7 +557,7 @@ if CHIP_LIB_SHELL
 choice POSIX_AEP_CHOICE
 	default POSIX_AEP_CHOICE_NONE
 
-endchoice 
+endchoice
 
 endif # CHIP_LIB_SHELL